EP 0268332 A1 19880525 - Method and apparatus for generating an adaptive peaking signal increasing the sharpness of a video signal.
Title (en)
Method and apparatus for generating an adaptive peaking signal increasing the sharpness of a video signal.
Title (de)
Verfahren und Schaltung zur Erzeugung eines anpassungsfähigen Anhebungssignals zur Vergrösserung der Schärfe eines Videosignals.
Title (fr)
Procédé et appareil pour engendrer un signal d'accentuation adaptable pour modifier la définition d'un signal vidéo.
Publication
Application
Priority
US 93138586 A 19861114
Abstract (en)
A conventional peaking signal derived by delaying the incoming video of luminance signal first by one horizontal line delay (12) and then by a second horizontal line delay (14) in modified by multiplication (32) with an adaptive factor. The adaptive factor is derived by first taking the difference (24) between the incoming signal and the twice delayed signal, then deriving the magnitude (26) or the square of this difference and multiplying (28) this by a factor K empirically derived for the particular displayed device. The resultant signal is then subtracted (30) from unity. This yields the factor by which the conventional peaking signal is multiplied (32). The conventional signal multiplied by this factor constitutes the final peaking signal which is added to the 1H delayed luminance signal to yield the desired peaked luminance signal.
IPC 1-7
IPC 8 full level
H04N 5/208 (2006.01); H04N 5/14 (2006.01)
CPC (source: EP KR)
H04N 5/14 (2013.01 - KR); H04N 5/142 (2013.01 - EP)
Citation (search report)
- US 3743766 A 19730703 - LOOSE P, et al
- GB 1299842 A 19721213 - PHILIPS ELECTRONIC ASSOCIATED [GB]
- US 3708753 A 19730102 - RADECKE H
- GB 2044576 A 19801015 - SONY CORP
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0268332 A1 19880525; EP 0268332 B1 19920304; DE 3777091 D1 19920409; JP S63187971 A 19880803; KR 880006912 A 19880725
DOCDB simple family (application)
EP 87202192 A 19871111; DE 3777091 T 19871111; JP 28563687 A 19871113; KR 870012836 A 19871114